jQuery css() method
css() method sets or returns one or more style attributes of the selected element.
Return CSS properties
To return the value of the specified CSS property, please use the following syntax:
css("propertyname");
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
alert("背景顏色 = " + $("p").css("background-color"));
});
});
</script>
</head>
<body>
<h2>這是一個標題</h2>
<p style="background-color:#ff0000">這是一個段落。</p>
<p style="background-color:#00ff00">這是一個段落。</p>
<p style="background-color:#0000ff">這是一個段落。</p>
<button>返回 p 元素的 background-color </button>
</body>
</html>Set CSS properties
To set the specified CSS properties, please use the following syntax:
css("propertyname","value");
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("p").css("background-color","yellow");
});
});
</script>
</head>
<body>
<h2>標題</h2>
<p style="background-color:#ff0000; width:200px;">段落1</p>
<p style="background-color:#00ff00; width:200px;">段落2</p>
<p style="background-color:#0000ff; width:200px;">段落3</p>
<p style="width:300px;">段落4</p>
<button>設置 p 元素的背景</button>
</body>
</html>Set multiple CSS properties
If you need to set multiple CSS properties, please use the following syntax:
css({"propertyname":"value ","propertyname":"value",...});
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("p").css({"background-color":"yellow","font-size":"200%"});
});
});
</script>
</head>
<body>
<h2>標題</h2>
<p style="background-color:#ff0000; width:200px;">段落1</p>
<p style="background-color:#00ff00; width:200px;">段落2</p>
<p style="background-color:#0000ff; width:200px;">段落3</p>
<p style="width:300px;">段落4</p>
<button>設置 p 元素的背景</button>
</body>
</html>
